The Manchester Planning & Zoning Board on Sept. 4 heard a continuation of a paired site-plan (SP2025‑017) and conditional‑use (CU2025‑025) application to add a roughly 4,400‑square‑foot chiller building and related utilities to the Catholic Medical Center campus at 100 MacGregor Street.

The project would remove an asphalt parking lot at the northwest corner of the campus, replace underground utility vault infrastructure, add a generator sized for hospital emergency power, and reconfigure nearby parking into a limited plaza and ambulance access. The conditional‑use request asks the board to accept off‑campus parking inventory from multiple adjacent lots owned by the hospital as an alternative to required on‑site spaces.

Staff and the applicant described the work as primarily infrastructure upgrades to support existing hospital operations and future growth. Ian Anderson of Kallis Design Group summarized the proposal as a minimally invasive expansion that replaces an undersized generator and updates underground mechanical vaults. Staff highlighted plans and technical‑review comments as central materials the board must incorporate into the record.

Board members focused most of their follow‑up on operational impacts. Vice Chair Brian Beaupre asked whether the proposed generator would serve the entire hospital and how often it would be tested; the applicant said the generator would support hospital power during outages and that testing requirements would follow state hospital standards but could not provide a testing schedule on the spot. Board members also pressed for a measured sound study for the mechanical equipment and rooftop HVAC units and asked the applicant to provide decibel specifications for expected noise leaving the property.

Because the application lacked a manufacturer sound rating and the board judged that information material to a decision, staff and the board agreed to keep the public hearing open. The applicant said he would coordinate with the planning staff and the project engineering team to submit a noise analysis and other requested clarifications. The board set a date certain to continue the public hearing on Tuesday, Sept. 18, 2025.

The board also noted the project includes a relocated underground mechanical vault, new utility connections (fire service, potable water and sanitary sewer), and a proposed building facade to match the campus. If the applicant provides the requested sound study and staff finds the resubmission complete, the board indicated it could close the hearing and act on conditions at the Sept. 18 meeting.